public A5rStream(ArcView file, A5rEntry entry)
{
m_file = file;
m_entry = entry;
m_segment = entry.Segments.GetEnumerator();
NextSegment();
}
public override ArcFile TryOpen(ArcView file)
{
uint id = file.View.ReadUInt32(0);
if (file.View.ReadUInt32(4) != ~id)
{
return(null);
}
int count = file.View.ReadInt32(0x30);
if (!IsSaneCount(count))
{
return(null);
}
uint index_offset = file.View.ReadUInt32(0x34);
if (index_offset >= file.MaxOffset)
{
return(null);
}
var base_name = Path.GetFileNameWithoutExtension(file.Name);
uint next_offset = file.View.ReadUInt32(index_offset);
var segments = new A5Segment[count];
for (int i = 0; i < count; ++i)
{
var segment = new A5Segment {
Offset = next_offset,
UnpackedSize = file.View.ReadUInt32(index_offset + 4),
Type = file.View.ReadByte(index_offset + 8),
Compression = file.View.ReadByte(index_offset + 9),
};
next_offset = file.View.ReadUInt32(index_offset + 0xA);
if (next_offset > file.MaxOffset || next_offset < segment.Offset)
{
return(null);
}
segment.Size = (uint)(next_offset - segment.Offset);
segments[i] = segment;
index_offset += 0xA;
}
var dir = new List <Entry> (count);
var riff_buffer = new byte[8];
for (int i = 0; i < count;)
{
A5rEntry entry;
var segment = segments[i];
var name = string.Format("{0}#{1:D5}", base_name, i);
if (0x3C == segment.Type)
{
Stream input = file.CreateStream(segment.Offset, segment.Size);
if (3 == segment.Compression)
{
input = new ZLibStream(input, CompressionMode.Decompress);
}
using (input)
{
if (8 == input.Read(riff_buffer, 0, 8) && riff_buffer.AsciiEqual("RIFF"))
{
uint riff_size = riff_buffer.ToUInt32(4);
entry = new A5rEntry {
Name = name + ".wav",
Type = "audio",
Offset = segment.Offset,
Size = 0,
UnpackedSize = 0,
};
var segment_list = new List <A5Segment>();
for (;;)
{
entry.Size += segment.Size;
entry.UnpackedSize += segment.UnpackedSize;
entry.IsPacked |= segment.Compression == 3;
segment_list.Add(segment);
++i;
if (i >= count || entry.UnpackedSize >= riff_size)
{
break;
}
segment = segments[i];
if (segment.Type != 0x3C)
{
break;
}
}
entry.Segments = segment_list;
dir.Add(entry);
continue;
}
}
}
if (0x3E == segment.Type)
{
name += ".bmp";
}
entry = new A5rEntry {
Name = name,
Type = 0x3E == segment.Type ? "image" : "",
Offset = segment.Offset,
Size = segment.Size,
UnpackedSize = segment.UnpackedSize,
IsPacked = segment.Compression == 3,
Segments = new A5Segment[1] {
segment
},
};
dir.Add(entry);
++i;
}
return(new ArcFile(file, this, dir));
}